2015 Design of a Pulse Power Supply Unit for Micro ECM

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1、IntJAdvManufTechnol(2015)78:537–547DOI10.1007/s00170-014-6322-5ORIGINALARTICLEDesignofapulsepowersupplyunitformicro-ECMAlexandreSpieser&AtanasIvanovReceived:16December2013/Accepted:24August2014/Publishedonline:10December2014#Springer-VerlagLondon2014AbstractElectrochemicalmicr

2、o-machining(μECM)re-andtheworkpieceisshapedaccordingtothefeaturesofthequiresaparticularpulsepowersupplyunit(PSU)tobedevel-tool-electrode[1].opedinordertoachievedesiredmachiningperformance.ThisμECMenablestheprecisemachiningofmicro-featuresbypapersummarisesthedevelopmentofapulse

3、PSUmeetingusingthecapacitivepropertiesoftheelectricaldoublelayertherequirementsofμECM.Thepulsepowersupplyprovides(EDL)whichformsitselfalongthesurfacesoftheelectrodes.tensofnanosecondpulseduration,positiveandnegativebiasThedissolutionprocesscanbeaccuratelyconfinedbysettingvolta

4、gesandapolarityswitchingfunctionality.ItfulfilsthethepulsedurationaccordingtothechargingtimeoftheEDLneedsfortoolpreparationwithreversedpulsedECMonthe[2–6].Thefrequencyandthepulsedurationare,respectively,machine.Moreover,thePSUisequippedwithanultrafasthigherandshorterthanininit

5、ialPECM[7,8].Thisprocessovercurrentprotectionwhichpreventsthetoolelectrodefromrequiresapulsepowersupplyunit(PSU)thatisabletodeliverbeingdamagedincaseofshortcircuits.Thedevelopedpulsepulsesatveryhighfrequencywithanadjustablepulsedura-PSUwasusedtofabricatemicro-toolsoutof170μmWC

6、-Cotion.Theamountofinformationintheliteratureonthedevel-alloyshaftsviamicro-electrochemicalturninganddrilldeepopmentofapulsePSUforμECMisverylimited.MostoftheholesviaμECMinadiskmadeof18NiCr6.Theelectrolytepublishedresearchuses‘off-the-shelf’signalgeneratorsusedforbothprocessesw

7、asamixtureofsulphuricacidandwhicharenotdesignedforelectrochemicalmachining(lowNaNO3aqueoussolutions.outputpower,slowshortcircuitprotectionandnointerfaceavailableforthecontrolsystem)andareverycostly.Alow-costpowersupplyunitwithsatisfyingperformancewillhaveKeywordsMicro-ECM.Micr

8、o-manufacturing.PulsePSU.tobedevelopedinordertomaketheμECMtec